#ifndef _ASM_SIGNAL_H
#define _ASM_SIGNAL_H
#include <asm/exception.h>
#include <dim-sum/types.h>
#include <uapi/asm-generic/siginfo.h>

#define _NSIG           64
#define _NSIG_BPW       __BITS_PER_LONG
#define _NSIG_WORDS     (_NSIG / _NSIG_BPW)   

#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))

typedef struct {
    unsigned long sig[_NSIG_WORDS];
}sigset_t;

#define NSIG		_NSIG

#define SIGHUP		 1
#define SIGINT		 2
#define SIGQUIT		 3
#define SIGILL		 4
#define SIGTRAP		 5
#define SIGABRT		 6
#define SIGIOT		 6
#define SIGBUS		 7
#define SIGFPE		 8
#define SIGKILL		 9
#define SIGUSR1		10
#define SIGSEGV		11
#define SIGUSR2		12
#define SIGPIPE		13
#define SIGALRM		14
#define SIGTERM		15
#define SIGSTKFLT	16
#define SIGCHLD		17
#define SIGCONT		18
#define SIGSTOP		19
#define SIGTSTP		20
#define SIGTTIN		21
#define SIGTTOU		22
#define SIGURG		23
#define SIGXCPU		24
#define SIGXFSZ		25
#define SIGVTALRM	26
#define SIGPROF		27
#define SIGWINCH	28
#define SIGIO		29
#define SIGSYS      31
#define SIGPOLL		SIGIO
/*
#define SIGLOST		29
*/
#define SIGPWR		30
#define	SIGUNUSED	31



#define SIG_BLOCK          0	/* for blocking signals */
#define SIG_UNBLOCK        1	/* for unblocking signals */
#define SIG_SETMASK        2	/* for setting the signal mask */

/* These should not be considered constants from userland.  */
#define SIGRTMIN	32
#define SIGRTMAX	(_NSIG-1)

#define SA_NOCLDSTOP	0x00000001
#define SA_NOCLDWAIT	0x00000002 /* not supported yet */
#define SA_SIGINFO	0x00000004
#define SA_ONSTACK	0x08000000
#define SA_RESTART	0x10000000
#define SA_NODEFER	0x40000000
#define SA_RESETHAND	0x80000000

#define SA_NOMASK	SA_NODEFER
#define SA_ONESHOT	SA_RESETHAND
#define SA_INTERRUPT	0x20000000 /* dummy -- ignored */

#define SA_RESTORER	0x04000000
#define SA_THIRTYTWO	0x02000000

typedef void (*__sighandler_t)(int);

#define SIG_DFL	((__sighandler_t)0)	/* default signal handling */
#define SIG_IGN	((__sighandler_t)1)	/* ignore signal */
#define SIG_ERR	((__sighandler_t)-1)	/* error return from signal */

typedef void __restorefn_t(void);
typedef __restorefn_t __user *__sigrestore_t;

struct sigaction {
#ifndef __ARCH_HAS_IRIX_SIGACTION
	__sighandler_t	sa_handler;
	unsigned long	sa_flags;
#else
	unsigned int	sa_flags;
	__sighandler_t	sa_handler;
#endif
	__sigrestore_t sa_restorer;

	sigset_t	sa_mask;	/* mask last for extensibility */
};


struct k_sigaction {
	struct sigaction sa;
};

typedef struct sigaltstack {
	void *ss_sp;
	int ss_flags;
	size_t ss_size;
} stack_t;

extern int arch_do_signal(struct exception_spot *regs);

extern int copy_siginfo_to_user(siginfo_t *to, siginfo_t *from);
int arch_sigretcode_page(void* __user addr, size_t size);


/* 
 * sigaltstack controls
 */
#define SS_ONSTACK	1
#define SS_DISABLE	2

#define MINSIGSTKSZ	2048
#define SIGSTKSZ	8192

#endif
